A common cause of intermittent alarms in continuous loop fire detectors?

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Study for the Aviation Maintenance Technician, Second Class (AMT2) Exam. Use flashcards and multiple choice questions, with hints and explanations provided for each question. Prepare for success!

Multiple Choice

A common cause of intermittent alarms in continuous loop fire detectors?

Explanation:
Continuous loop fire detectors rely on stable electrical characteristics along the loop to determine if a detector is sensing heat. An intermittent short in the detector system wiring changes the loop impedance momentarily, which the control panel can interpret as a fire condition. When the short appears, an alarm can fire; as the short opens or shifts, the alarm clears, producing the intermittent behavior. While issues like LED failure, battery problems, or vibration can cause faults or malfunctions, they don’t as reliably produce the pattern of brief, repeating alarms that a wiring short in the loop does.

Continuous loop fire detectors rely on stable electrical characteristics along the loop to determine if a detector is sensing heat. An intermittent short in the detector system wiring changes the loop impedance momentarily, which the control panel can interpret as a fire condition. When the short appears, an alarm can fire; as the short opens or shifts, the alarm clears, producing the intermittent behavior. While issues like LED failure, battery problems, or vibration can cause faults or malfunctions, they don’t as reliably produce the pattern of brief, repeating alarms that a wiring short in the loop does.

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